At the age of ten, he appeared in films for the first time, in 1935's Inquilab. After acting in several films over the next 12 years, Raj Kapoor's big break came with the lead role in Neel Kamal (1947) opposite Madhubala in her first role as a leading lady. In 1948, at the age of twenty-four, he established his own studio, R. K. Films, and became the youngest film director of his time making his directorial debut with Aag starring himself, Nargis, Kamini Kaushal and Premnath. In 1949 he co-starred alongside Dilip Kumar and Nargis in Mehboob Khan's hit film Andaz which was his first major success as an actor. He had his first success as producer, director and star of Barsaat released later that year.[citation needed]

In 1970 he produced, directed and starred in his ambitious film Mera Naam Joker which took more than six years to complete. His son Rishi Kapoor made his debut in this film playing the younger version of his character. When released in 1970, it was a box office disaster and put Kapoor and his family into a financial crisis.[17] In later years it was acknowledged as a cult classic.[18] In 1971, he launched his eldest son Randhir Kapoor in the family drama Kal Aaj Aur Kal starring himself, his son Randhir, his father Prithviraj Kapoor as well as Randhir's would-be-wife Babita. He launched his second son Rishi Kapoor's career in 1973 when he produced and directed Bobby which was a huge box office success and introduced actress Dimple Kapadia, later a very popular actress; it was the first of a new generation of teen romances. Dimple wore bikinis which was quite unique for Indian films then. In 1975 he acted alongside his son Randhir again in Dharam Karam, which Randhir also directed.

Raj Kapoor suffered from asthma in his later years; he died of complications related to asthma in 1988 at the age of 63. He collapsed at the event where he was to receive the Dadasaheb Phalke Award, and was taken to the All India Institute of Medical Sciences (AIIMS) for treatment. He was hospitalised for about a month before he succumbed to complications arising from his asthma.[20] At the time of his death, he was working on the movie Henna (an Indo-Pakistan based love story). The film was later completed by his sons Randhir and Rishi Kapoor and was released in 1991.

Raj Kapoor is appreciated both by film critics and movie fans. Film historians and movie buffs speak of him as the "Charlie Chaplin of Indian cinema," since he often portrayed a tramp-like figure, who, despite adversity, was still cheerful and honest. His fame spread worldwide. He was adored by audiences in large parts of Africa, the Middle East, the former Soviet Union, China, and Southeast Asia; his movies were global commercial successes. Raj had the knack of getting the best out of any one, since he had mastered all departments of film making and even marketing them.[peacock term] His films reflected the Era in which it was made.

The song is still extremely popular and has been featured in a number of movies since Shree 420 was released. Indian author Mahasweta Devi stopped the show with her inaugural speech at the 2006 Frankfurt Book Fair when she used these lyrics to express her own heartfelt patriotism and debt to her country.

Raj Kapoor was a canny judge of filmi music and lyrics. Many of the songs he commissioned are evergreen hits. He introduced the music directors Shankar-Jaikishan and the lyricists Hasrat Jaipuri and Shailendra. He is also remembered for his strong sense of visual style. He used striking visual compositions, elaborate sets, and dramatic lighting to complete the mood set by the music. He introduced the actresses Nimmi, Dimple Kapadia, and Mandakini, as well as launching and reviving the careers of his sons Rishi, Randhir and Rajiv. He was also famous for making his actresses wear revealing clothing which was not very common in Indian cinema.

A postage stamp, bearing his face, was released by India Post to honour him on 14 December 2001. To honour him, a brass statue of his was unveiled at Walk of the Stars at Bandra Bandstand in Mumbai in March 2012.

In 1946, Raj Kapoor married Krishna Malhotra, who was his first cousin once removed. The news of his marriage was reported in the cine-magazine Filmindia June 1946 issue as, "Raj Kapoor, the talented and versatile son of Prithviraj Kapoor ended his career of wild oats by marrying Miss Krishna Malhotra in the second week of May at Rewa".[22] Krishna's father was Prithviraj Kapoor's maternal uncle. It was a match arranged by the family, and Krishna proved to be a wife and mother in the traditional mould, which is what the family wanted. Krishna's brothers, Rajendra Nath, Prem Nath and Narendra Nath, later became actors, and her sister Uma is married to Prem Chopra.[23]

Kapoor was rumoured to have had a longtime romantic relationship with the renowned actress Nargis during the 1940s and 1950s, despite being a married man, although neither ever publicly admitted to this.[24] The couple starred in several films together, including Awaara and Shree 420. As Raj would not leave his wife and children, Nargis ended their relationship after Chori Chori and married Sunil Dutt with whom she fell in love on the set of Mother India (1957). Kapoor is also said to have had an affair with renowned actress Vyjayantimala during the shooting of Sangam. Vyjayanthimala has denied that she was ever involved with Kapoor. She deemed the whole thing a publicity stunt by Kapoor to promote his film. Kapoor has also been linked with the southern actress Padmini.[25][26]

Both of Kapoor's brothers, all three of Kapoor's sons, two of Kapoor's daughters-in-law and three of Kapoor's grandchildren have been active at various times in the film industry. His granddaughter Kareena (daughter of Kapoor's eldest son Randhir) and grandson Ranbir (son of Kapoor's second son Rishi) are the latest Bollywood superstars from the Kapoor family.

In June 2011, Noah Cowan, Artistic Director of TIFF Bell Lightbox, and Sabbas Joseph, Director, Wizcraft along with members of the Kapoor family came together to pay tribute to the life and work of Indian actor, director, mogul and legend Raj Kapoor, as presented in partnership by TIFF (Toronto International Film Festival), the International Indian Film Academy (IIFA), and the Government of Ontario.Indian Mirror Reports suggest Kapoor will be inducted onto the Brampton Walk of Fame in Ontario, Canada.[27]

Mukesh was Raj Kapoor's almost exclusive singing voice in almost all of his films. Also, when Mukesh died, Raj had said, Main ne apni aawaaz ko kho diya... (I have lost my voice...). However Manna Dey has also sung many notable and super-hit songs for Raj Kapoor, for instance in Shree 420 and Chori Chori. Examples of such Manna songs are best illustrated by the following list:

^"'Raj Kapoor Crescent'". Asian Image. Lancashire UK. 9 June 2011. Retrieved 19 June 2011. The city will also like to induct Shri Raj Kapoor into the Brampton Hall of Fame, having a star placed there in his honour..